amfoto1 wrote in post #16571878
Better AF system is true.... It's similar to the 7D's, more sophisticated and more user configurable for different situations. Additional AF points (19 vs 9). Peripheral points (all those other than the center) that are a bit more usable. A "center point only" shooter won't see much difference, but anyone else will have more choices and find the outer points somewhat more usable.
The 70D's 19-point AF is a slightly scaled down version of the 7D's. The 70D lacks two of the AF point selection modes that the 7D offers: Expansion Points and Spot Focus. Otherwise, functionality is about the same. Both cameras offer All Points, Single Point and Zone Focus.
The 7D also has a discrete chip running the AF system (1D series style)... 60D and, AFAIK, 70D don't. he 70D uses a newer generation and more powerful Digic 5 processor, though, which might largely negate any differences this might make. (7D uses dual Digic 4 processors to support it's slightly higher frame rate.)
But Canon rates the 70D's AF system low light capabilities nearly the same as the 60D's. In bright light, the 60D's is actually rated to be more usable than the 70D's. Canon's ratings.... 60D: 0EV to 20EV. 70D -0.5EV to 18EV. (In comparison: 7D is rated same as 70D, while one of the best, 5D Mark III is rated -2EV to 18EV.) In use it may be a bit better handling low light than rated (I know the 5DII's is better than it's rated, while the 7D's is pretty much exactly as stated). Still, it's only a half EV difference, so don't expect a big difference in low light. Two full EV difference in bright light might be more significant, depending upon what situations you more commonly shoot.
20MP vs 18MP is pretty much a yawner.
Slightly better high ISO and noise handling seems to be true. Emphasis on "slightly", though. 70D does go a bit higher on the ISO scale, to 25600 (compared with 12800).... you'll have to be the judge whether it's usable, though.
Bigger VF? The 70D has a 98%, X.95 magnification, 22mm eye relief VF. 60D has a 96%, X.95 mag, 22mm VF. Personally I'd call that a pretty mild improvement.
70D gets the same active matrix/transmissive LCD screen as 7D (and 5DIII, 1DX, though those cams use it with a different AF system). This takes a bit of getting used to, but is neat once you feel comfortable with it. It does make the VF slightly less bright, though. And focus screens technically aren't interchangeable (so using manual focus lenses might be more difficult... or expensive/limiting if a third party focus screen is fitted).
The active matrix/transmissive LCD screen offers a couple more neat little features. One is grid on demand. You can add a grid at the push of a button, rather than having to change out the focus screen. It also allows an electronic level to be displayed in the viewfinder. (Both these also can be displayed on the rear LCD monitor. In fact there are more grid options on the rear monitor, than in the viewfinder of the 70D). These can be handy features for architectural photography, among other things.
Definitely Micro Focus Adjust 2.0 is a big improvement. In fact 60D didn't have any form of MFA at all (even though it's predecessor the 50D did), so any form of it provided would be an improvement. But in fact the 70D's is better than version 1.0 on 7D. If you use MFA
, yes it might be worth the upgrade. Not everyone bothers with it. Still, better to have it, just in case it's needed with your particular lenses (and you don't feel like sending them in for calibration).
The new focusing system in Live View and video is a true game changer... if
you shoot Live View and/or video frequently. The Dual Pixel CMOS isn't new, other manufacturers have used something like it in some cameras for a few years. However, Canon's implementation of it on the 70D appears to be far and away the most sophisticated use of the technology yet done by any manufacturer. Canon claims it's possible to focus anywhere withint 80% of the image area, while many other manufacturers limit their Dual Pixel focusing to just a few select points within the image area.
One limitation is that the Dual Pixel CMOS cannot track movement for continuous shooting (i.e., viewfinder/AI Servo style). It's main claim to fame is speed that rivals that of One Shot using the viewfinder. That's a big improvement over the ploddingly slow Live View focus of previous models.
I haven't seen any info about increased sealing or more metal clad body than the 60D. AFAIK, it's built about the same as the 60D.... some plastic, but still solid feeling (i.e., plastic isn't necessarily a bad thing... it can be quite durable, done right).
Canon rates the buffers of both 60D and 70D to around 16 RAW files. They rate 60D to 58 JPEGs, vs a slightly higher 65 JPEGs with the 70D.
However, 70D will fill the buffer faster because it's frame rate is increased from 5.3 fps to 7 fps. (For comparison, 7D has up to 8 fps rate, 25 RAW files or 130 JPEGs, with UDMA 7 card and firmware 2.0.x. Note: frame rates slow in some circumstances, for example to allow time for metering.)
70D has built-in WiFi. It also is compatible with the GPS module, if that's important. And the 70D's LCD is a "touch screen". Though rated the same 1 million pixels and 3" diagonal size as the 60D's, it might be slightly brighter due to the "air gapless" design needed for the touch screen function.
In a nutshell.... for a video shooter or heavy Live View user, the upgrade makes a lot of sense thanks to the new Dual Pixel CMOS focusing system offered by the 70D. Anyone else will probably need to find several of the more incremental improvements important to their usage, to really justify the upgrade.